code: def testPerfectConsonance(self):
      cFreq = 261.63
      tones = [cFreq, cFreq]  # C-C1#
      spec = [1, 1]
      self.assertAlmostEqual(Dissonance()(tones, spec), 0)
  
file_path: essentia/test/src/unittests/tonal/test_dissonance.py
imports: from essentia_test import *
  from numpy import random, pi, sort
label_desc: Use image node_id 13 for calling the TestDissonance obj's underlying member method code with example usage: obj.testPerfectConsonance() without return types